openscad: Fix checkver

* Relates to: openscad/openscad.github.com#171

Author: z-Fng

bucket/openscad.json

@@ -26,7 +26,7 @@
         "Remove-Item \"$(shortcut_folder $global)\\OpenSCAD.lnk\" -Force -ErrorAction SilentlyContinue"
     ],
     "checkver": {
-        "url": "https://www.openscad.org/inc/win_release_links.js",
+        "url": "https://www.openscad.org/inc/releases.js",
         "regex": "OpenSCAD-([\\d.-]+)-x"
     },
     "autoupdate": {